Improvement in spark-arresters for locomotives



E. 830. S.'OSBORN. Spark-Arrester for Locomotives.

No. 205,806. Paterited July 9,1878.

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"- PETERS. PHOTO-UTHOGRAFHER. WASHINGTON. D C.

UNITED STATES PATENT OEEioE.

EDlVARD OSBORN AND CHARLES S. OSBORJ, OF NEVTON, NEW JERSEY.

IMPROVEMENT IN SPARK-ARRESTERS FOR LOCOMOTIVES.

Specification forming part of Letters Patent No. 205,806, dated July 9, 1878; application filed N ovcinbcr 1, 1877.

To all whom it may concern:

Be it known that we, EDWARD OSBORN and CHARLES S. OSBORN, of Newton, Sussex county, New Jersey, have invented an Improvement in Spark-Arresters for Locomotives; and we do hereby declare the following to be a full and correct description of the same, reference being had to the accompanying drawings, in which- Figure 1 is a vertical section of our inveir tion. Fig. 2 is a top view. Fig. 3 is a view of one of the sections; and Fig. 4, an enlarged vertical sectional view, showing the perforations more clearly.

Our invention relates to an improvement upon the device secured to us by Patent No. 160,614, dated March 9, 1875 and it consists in forming a spark-arrester of an inverted truncated cone secured in the exit-orifice of a smoke-stack with an inverted conical point, adjusted in place by means of rods secured to the cylindrical part of the smoke-stack, the whole provided with inverted conical rectan gular holes graduated in size from the center to the circumference.

In the drawings, A represents the smokestack of a locomotive, and B the spark-arrester. The spark-arrester B is an inverted cone consisting of the truncated part U and point D. The base or truncated part 0 is secured in the top or exit-orifice of the smokestack, and itinay be cast in six or more sections, as shown, or it may be cast in one piece. It must, however, fill the exit-orifice in the top of the smoke-stack, and may be secured by bolts to the flange or rim of the top of the stack. The pointD is secured in place, and adjusted upon rods (4 at extending up from the sides of the cylindrical part of the smoke-stack, and provided with screw-thread washers and nuts, as shown.

It will be observed that when the parts O and D are properly secured in their places there is no exit for the smoke and sparks except through the conical orifices entirely filling the cone B. The form of these orifices is rectangular, and they increase in size from the center or apex of the point D to the circumference of the base 0. The size and proportion of increase of said holes are about as follows: The center ones may be about one inch long, one-sixteenth of an inch wide, and

the outer ones four inches long and threesixteenths of an inch wide, the intermediate ones being in the above proportion. The orifices are also conical in formthat is, smaller that what sparks do escape can do no dainage, the force of the exhaust sending them so far into the air above the engine that they are soon extinguished.

Having thus fully described our invention, what we claim, and desire to secure by Letters Patent, is v In a spark-arrester, the combination of the inverted truncated cone 0, secured in the exitorifice of a smoke-stack, with the inverted conical point D, adjusted in place by means of the rodsc, the whole provided with inverted conical rectangular orifices graduated in size from the center to the circumference, substantially as described.

The above specification of our said invention signed and witnessed at Newton this 20th day of October, A. D. 1877.

EDWARD osnonn. CHARLES s. oseoanlVitnesses:

CHARLES Anvis, S. S. 000K. 

